Conveying apparatus.



PATENTED AUG. 6, 1907.-

T. S. MILLER. CONVEYING APPARATUS. APPLIOATION FILED JULY 1, 1904.

4 BHEHTSi'SHF-ET l.

m: NORRIS PETERS cm, WASHINGTON, a, c.

PATENTED AUG. 6. 1907.

T. s. MILLER. commune APPARATUS.

APPLICATION FILED JULY 1, 1904.

Mums-sun 2.

1m: naRRls PETERS cu., WASPIINGTON. n c

No. 862,748. PATENTED AUG. 6', 1907.

T. s. MILLER.

CONVEYING APPARATUS.

APPLIUATION FILED JULY 1, 1904.

4 SHEETS-SHEET a.

FHE NORRIS PETERS co., wAsmr/crou, n. c,

PATENTED AUG. 6, 1907.

T. S. MILLER. CONVEYING APPARATUS.

.APPLIUATION FILED JULY 1,- 1904.

4 SHEETS-SHEET 4' fiwgwd w. 6.2 Que;

THOMAS SPENCER MILLER, OF SOUTH ORANGE, NEW JERSEY.

CONVEYING APPARATUS.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed July 1 1904:- Serial No. 214,909.

To all whom it may concern:

Be it known that I, THOMAS SPENCER MILLER, a citizen of the UnitedStates, and a resident of South Orange, Essex county, and State of NewJersey, have invented a new and useful Improvement in ConveyingApparatus, of which the following is a specification.

My invention relates particularly to conveying apparatus and it consistsin certain novel parts and combinations of parts particularly pointedout in the claims concluding this specification.

In the accompanying drawings, I have shown my invention applied in formswhich are at present preferred by me, but it will be understood thatvarious modifications and changes may be made without departing from thespirit of my invention and without exceeding the scope of my claims.

In the accompanying drawings, Figures 1, 2, 3, 8 and 16 illustratediagrammatically various forms of apparatus embodying my presentinvention. Fig. 4 shows in detail the winch for operating the conveyerrope. Figs. 5 and 6 are, respectively, side and end views of the loadcarriage. Fig. 7 is a detail of one of the parts. Fig. 9 is a detail ofthe apparatus about the mast-head of the towed ship. Fig. 10 is an endview of a part of the apparatus shown in Fig. 9. Fig. 11 is a view ofthe main mast of the towed ship. Fig. 12 is an end view of the tensioncarriage shown in Fig. 9. Figs. 13 and 14 show the arrangement of theparts of my apparatus over the rear portion of the towing ship. Fig. 15is a detail view of a coupling in the sea anchor line. Figs. 17, l8, l9and 20 are details of the modification of Fig. 16.

The following is a description of the structure shown in theaccompanying drawings.

In all the figures, 1 is the towing boat; 2 the towed boat; 3, the towline connecting the same. 4, the operating winch. 5 and 5 are twostrands of an endless transporting and supporting cable. 6 is a supporton the towing ship. 7, a support on the towed ship, which in thisinstance, is shown as the foremast of the collier. 8 is another support,shown as the main mast of the collier. 9 is the load carriage. 10 is theload. 11, 12, 13, 14, 15, 16 are pulleys supporting the endlesstraversing rope. This endless traversing rope leads from the winch 4over the pulley 11 on the towing ship, thence to the pulley 12 on thetowed ship. 13 is a pulley mounted in a tension carriage. The rope isthence led over pulley 14 on the foremast of the towed ship, thenceacross the span and under the pulleys 15 and 15, thence over the pulley16 on the main mast of the towing ship. 17 is the tension carriage shownon the towed ship between the masts 7 and 8, mounted on the stay 18.Attached to the tension carriage l7 and extending rearward, is the line19, to the end of which is attached the sea anchor 20. The sea anchorline 19 is composed of two parts, namely: 19 and 19, which are heldtogether by a releasing hook 21, which will be more fully describedhereafter. 22 is a trip line for inverting the sea anchor when it isdesired to destroy its pulling power. 23 is a winch on the after part ofthe towed ship for winding in the trip line 22.

In Fig. 4, is shown an ordinary double cylinder reversiblelink-motion-engine or winch. 24 and 24 are cylinders. 25 and 25 arecrank wheels. 26 is a driving pinion on crank shaft 27. The pinion 26drives the gear 23 mounted on the shaft 29, which shaft is mounted inbearings 30 and 31. On one end of this shaft 29 is located a drum 32having a grooved face. It will be observed in the operation of thisWinch that the drum 32 is caused to revolve in either direction. Thestrand 5 of the endless rope is led down on one side of the drum 32while strand 5 is being paid out at the same rate of speed on theopposite side of the drum.

Figs. 5 and 6 represent two views of a preferred form of hanger, truckor load carriage. 33 is a wheel free to travel on the strand 5 of theendless supporting rope. The wheel 33 is provided with a V-groove 34,which pinches somewhat the strand 5. 35 is a ratchet wheel secured tothe side of the wheel 33. 36 is a pawl engaging the same. It will beobserved that while the wheel is free to revolve in one direction, itcannot revolve in the opposite direction. 37 are antifriction bearingsfor the support of the wheel 33. 38 is a pendent portion of the framewhich is part of a complete forging or-casting which passes upwardly tothe side of the pulley, curving over the top and returning down theopposite side of the pulley and terminating in a handle, 39. At thelower end of this frame is a drop hook 39. This hook is composed of twoside pieces 40, 41, pivoted on the pin 42. 43 is the tongue of a hookwhich is pivoted at 44 and which is provided with a shoulder 45. 46 is alever which, when set, resists the turning of the hook 43. 4'7, 47 arehorizontal extensions to the lever 46. It will be clearly seen that ifthe bars or extensions 47 of the hook 46 are pushed in a directionopposite to the arrow, the point of the hook 43 will collapse and theload will drop. 48 is a bail supporting the load, more particularlyshown in Fig. 7 49 (Fig. 7) is the hook to which the load is attached.

In the practice of conveying loads by a wire rope by a continuouslymoving endless rope, it has been found expedient to operate the same ata moderate rate of speed,600 feet per minute is about the maximum speedwhich has, at the present time, been attained; 300 feet per minute isthe average. The reason why the speed must be slow is because the loadsmust be placed on a continuous moving rope and taken therefrom at shortintervals of time. In the usual practice, loads are placed on thetraversing rope by any desired grip. Should the speed be great, the loadwill be jerked and the grip or rope injured. Inthc delivery of the load,slow speed is necessary. It will be observed that in my invention theload is pushed off an inclined fixed track and attains some speed beforereaching the cable. The load then starts on its downward route bygravity and considerably faster than the speed of the endless rope.Should the endless rope be at rest, the loadcarriage will travelconsiderably more than one-half the distance between the ships. In mysystem, I prefer to run the conveying rope at a relatively low rate ofspeedsay 300 feet per minute, or else vary the speed so that when theload approaches the terminal, its speed will be slow. The load carriagetraveling by gravity, may travel at the rate of nearly 1000 feet perminute, depending upon the grade. As soon as the load carriage 9 hastraveled as far as it will by gravity, the disposition will be to returndown grade again to the center of the span. This, however, is resistedby the ratchet and pawl 36 in connection with the V-shaped groove 34(Figs. 5 and 6) and the gripping device (Figs. 19 and 20); that is tosay, the wheel (Figs. 5 and 6) is prevented from revolving by theratchet and pawl and it is also prevented from slipping on the rope bythe V-shaped groove. In Figs. 19 and 20 the pawl or grip prevents theload carriage I from movement except in one direction. The pulley comesto a rest relative to the rope. As the rope, however, is traveling itinsures the load completing its journey to the place where it will bedeposited.

I believe I am the first to operate a conveying device by combining aload carriage traveling by gravity upon a supporting rope and providedwith means whereby the load may be carried on an up grade by the use ofthe longitudinal motion of the supporting rope, or of an auxiliary rope.

I11 Fig. 9, is shown the method of fitting up the foremast 7, of thetowed ship. The tension carriage 17 consists of a snatch-block 50,containing the pulley 13 mounted in the usual fashion. The block issupported by a pulley 51 mounted in a frame 52. It will be noted (seeFig. 12) that the pulley of block 50 is supported by flanges 53 whichare capable of carrying the weight of the block 50. This block 50 is,therefore, adapted to move in a horizontal direction relative to theframe 52 and may do so by the removal of the pin 54. The pin 54 is verylight and easily broken. Its use will be explained hereafter. 55 is apulley on the main mast 8 on the towed ship 2, which serves to supportthe sea anchor line 19. 56 is a truck mounted on wheels 57 and 58running on an inclined fixed cable 58 and containing a drop-hook 59similar to that described in Figs. 5-and 6. The truck 56 is hoisted byrope 56 which is led over the pulley 68, thence down to the deck whereit may be operated by a winch or any other hoisting device. The load 10is supported by the hook 49 carried by the drop-hook 59. The ring 48 isplaced by hand upon the drop-hook 39 of the load carriage 9. A pull uponthe lever 60 of the drop-hook 59 will cause the load to fall and thus betransferred to the hook 39 of the load carriage. 61 is a short sectionof fixed trackway pivoted at 62 and provided with a shoe 63. When theload carriage 9 has received the load it is pushed off of the track 61onto the cable 5. It then begins its jour ney down the catenary curve;the momentum of the load carrying it a considerable distance beyond thecen ter of the span. As before explained, the endless rope is travelingat a moderate rate of speed which causes the load carriage 9 to completeits journey to the place of delivery. The method of delivering loads tothe endless traversing rope is illustrated in Fig. 9. v

Fig. 13 illustrates the load carriage 9 approaching a haul-down-block65. This block contains two wheels 15 and 15 and is held down by rope 66leading to the deck of the ship. 67 is a forked bail reaching out towardthe carriage 9. When the carriage 9 comes in contact with the block 65,the fork 67 collides with cross bar 47 and the load is thereby released.The truck 9 is then taken from the branch of the cable 5 after which itis placed upon the branch 5 in an inverted position for returning to thetowed ship (see Fig. 14).

I have now described the operation of transferring the loads between twosupports.

An important feature of my invention provides against the damage causedby an accidental breakage of the tow-line while under way. It is evidentthat when coaling at sea it will be always desirable to have as long atow-line as possible, for safety. It is also evident that in a heavy seathe ships may plunge in such a way as to part the tow-line. Therefore,it is essential that provision be made whereby in the event of breakageof the towline, the lines may free themselves from the ships.

In Fig. 9, the pulleys 12 and 14 are shown in a frame. These pulleysinclose both branches 5 and 5 of the supporting or transporting rope. Itwill be noted that in Fig. 10, this frame is supported on the flangeswhich form a part of bands 70 and 71 on the mast. These flanges resistvertical stress upon the pulley but do not resist the horizontal motionof the frame, excepting that supported by the pins 72 and 73. These pinsare of very light construction and are ample to take care of anyhorizontal stress caused by the motion of ropes 5 and 5 which pass overthe pulleys 12 and 14. It has already been explained that the pulley 50and tension carriage 17 is adapted to move horizontally relative to thecarriage 52. In operation, therefore, should the tow-line part, thetowed ship 2 will settle back, the tension block 50 will thereuponcollide with the pulleys 12 and 14 while the-carriage 52 collides withthe foremast 7; pins 54, 72 and 73 will be broken, carriage 52 will beleft suspended upon the stay 18 and the pulleys 12 and 14 will becarried by ropes 5 and 5 In Fig. 8 it is seen that the tension pulley 50is carried clear of the bow of the towed ship the ropes being undertension of the sea anchor. I have introduced another feature for theclearance of these lines which involves the use of another release hook74 coupling the two parts of the sea anchor line 19 and 19 together.

In Fig. 15, 75 is a flanged ring preventing the finger 21 from opening.This flanged ring is shown in Fig.8 ready to collide with the pulley 55on the mast 8 of the towed ship. A collision will cause this flangedring 75 to be pushed toward the sea anchor; this will clear hook 74 andthe rope 19 will thus be freed from the sea anchor. The endless rope 5and 5 will then fall into the sea dragging with it only a portion of thesea anchor line 19. The tail-block will, therefore, be carried out aconsiderable distance over the sea before the knock-offhook astern ofthe towed ship comes into collision with the main mast-head of the towedship. Thus, when the sea anchor line is detached, the loop and thetailblock will fall into the sea without any opportunity for its fallingupon any portion of the towed ship where it might foul. The weight ofthe tail-block and mastblock will also cause the endless rope to settlein the sea and hold the endless rope approximately taut. This willprevent the endless rope coiling up and fouling with the screws of thetowing ship. The endless rope can then be recovered on the deck of thetowing ship without danger to anything.

In Fig. 3, it will be seen that I have omitted the use of ahaul-down-block containing the wheels 15 and 15. The load, in thisinstance, is carried to the main mast of the towing ship where it isdropped to an auxiliary load carriage 76 running on the cable 77 andthus transferred to the deck amidship on the towing ship. The advantagesof the haul-down-block 65 will be further set forth, as it forms a veryimportant feature of my invention. The haul-down-block 65 has two wheels15 and 15 having a running engagement with the lower branch of theendless rope 5 To this block is attached the line 66 which may beshortened or lengthened in any suitable manner. In this way, the gradeof the lower branch 5 may be controlled. It will be evident that thespeed with which the load 10 is transported along the endless rope willbe somewhat affected by the direction, of the wind during the operationof the apparatusfor if the ship is towing head-on to the wind, therewill be a considerable resistance offered to the load 10 which willserve to slacken the speed. At other times, the wind may be in theopposite direction which will increase the speed of the load 10. It isdesirable, therefore, that there be some means for increasing ordecreasing the grade of the lower branch of the endless rope 5 This isprovided for in the haul-down-block 65 and the lengthening or shorteningof the line 66.

In Fig. 2, I have shown another modification of my invention in whichthe winch 4 is located on the towed ship. It will, therefore, be evidentthat the means heretofore described for clearing the lines will not beavailable in this construction. 80 represents a small line attached tothe mast 6 of the towing ship 1. It is led over a pulley 81 on theforemast 7 of the towed ship 2 and from thence to the tail-block 17. 79is a small wheel having a running engagement with the line 80. Thepulley 79 has a connection with the pulley 78 about which the endlessrope bonds at the mast 6 of the towed ship 1. In the event of breakageof the tow line, the pulley 78 is detached from the mast 6, and as theship 2 settles back the weight of the block 78 will be carried by thepulley 79 along the line 80 until it is clear of the towed ship 1. Afurther settling back of the towed ship 2 would cause a break in theline 80, which is of very light construction. When the line 80 breaks,the pulley 78 and the endless rope will fall into the sea astern of thetowing ship 1.

A further modification of my invention is shown in I Fig. 16, in whichthe cable 19 instead of terminating at the tension carriage 17terminates on the towing ship 1. Thus, the cable 19 forms an auxiliarysupport for the load carriage 9. In fact, the entire load may be carriedon the cable 19 and simply propelled and controlled by the endlesscable.

In Figs. 17 and 18, I show modifications of the tension carriage 17 inwhich it will be observed that the l Q no cable 19 is clamped orotherwise secured to the side of the frame 50. 82 is a clamp representedin the drawing as a strap secured by bolts 83 and 84 to the side of thetension carriage 17.

Figs. 19 and 20 show a side and end view of modifications of the loadcarriage. The lower branch 5 of the endless cable is shown in thedrawings as of reduced size, because the load may be supported on thecable 19 and, therefore, the endless rope will not be called upon tosupport its share of the load. 85 is a cam pivoted at 86 to the sideframe 38 of the load carriage. If the line 5 remains stationary and theload carriage travels in the direction of the arrow, the cam 85 willrest upon the upper portion of the line 5 and the wheel 87 supportingthe line 5 will travel in the direction of the arrow. If, however, theload-carriage travels at a slower speed than the line 5 the cam 85 willbe forced toward the rope and the wheel 87, the effect of which will beto arrest the wheel 87 from revolution and pinch the line 5 in theV-groove, 88, of the wheel 87. This will cause the carriage to be drawnalong with the branch 5 of the endless rope and at the same speed atwhich the rope is traveling. I have shown the ratchet wheel 35 and thepawl 36 on the wheel 33 (Fig. 19) the object of which is the same asthat shown in Fig. 6. It is evident that if the branch rope 5 werecaused to stop altogether, the cam 85 lifted and the branch 5 liftedtherefrom, it will be necessary that other means be provided forpreventing the load from traveling down grade. This is provided for bythe ratchet 35 on the upper wheel. 89 is a handle for lifting the cam 85for the introduction or removal of the rope 5 The haul-down-block shownin Fig. 16 is provided with a saddle 9O resting upon the cable 19 andtwo wheels 91 and 92, one above the other, below the lower branch 5 ofthe endless cable.

In the construction of my invention shown in Fig. 16, the endless cablemay be propelled at various rates of speed or stopped altogether, ifdesired. A load may be placed upon the cable and allowed to run down thegrade of the catenary while the endless rope remains at rest. Theendless rope may then be started and run at a higher rate of speedsufiicient to complete the journeying of the load can'iage when it mayagain come to a state of rest, permitting heavy loads to be dischargedtherefrom without shock or jar. During the time the load is ascendingthe upgrade of the catenary and while the load carriage is at rest, afurther load may be journeying on the down grade of the cable. In thisparticular, I attain a great advantage, because it is very desirable inhandling large loads that the load carriage come to a state of restgradually before discharging.

Although I have described my invention as applicable to coaling warships at sea, I do not wish to limit myself to such a use, for it isclear that there will be many opportunities for making use of myinvention between any two supports. Neither do I wish to limit myself tothe employment of an endless rope, because the sus pended cable ortrackway employed by me may be drawn longitudinally a short distance andthen allowed to return. Each time the cable is being drawn inwardly, itmay draw along with it a load, and the return thereof may be coincidentwith the travel of the load carriage by gravity.

, polled by the cable on the up grade thereof.

ing vessel, a towed vessel, a towing-line, a cable-line, a ten siondevice attached to the cable-line and means whereby, when the distancebetween the vessels becomes abnormal and the cableline, carrying with itthe tail-block, is carried forward of the bow of the towed vessel, aprescribed distance, the tension of the tension device is released.

16. In a conveying apparatus, the combination of a towing vessel, atowed vessel, a towing line, a cable-line extending to a tension devicebeyond an elevated support on the towed vessel and an automaticallyoperated releasing device in said cable beyond said support, wherebywhen the distance between the vessels becomes abnormal the cable isautomatically parted.

17. In a conveying apparatus, the combination of a towing vessel, atowed vessel, a towing line, a cable-line extending to a tension devicebeyond an elevated support on the towed vessel, a carriage adapted totravel on said cable line, a hinged hook, a locking device having anunlocking projection and an abutment against which said projection maycollide and thereby release the hook, said hook and locking device beinglocated behind said support.

18. In a conveying apparatus, the combination of a towing vessel, atowed vessel, a towing line, a cable-line extending to a tension devicebeyond an elevated support on the towed vessel, a carriage traveling onsaid cable line Having thus described my invention, what I claim as newand desire to secure by Letters Patent is:

1. In a conveying apparatus, the combination of a movable cable and aload carriage, an engine for propelling the cable, said carriage beingsupported on a wheel and free to move along said cable in one direction,and restrained from movement in the opposite direction.

2. In a conveying apparatus, the combination of a movable cable and aload carriage; said carriage being sup ported on a wheel and free tomove along said cable in one direction and restrained from movement inthe opposite direction, the face of said wheel being provided with agroove fashioned so as to grip the cable.

3. In a conveying apparatus, the combination of a traveling cable, aload carriage free to move longitudinally with respect to said cable inone direction only.

4. In a conveying apparatus, the combination of a traveling cable and aload carriage free to move longitudinally with respect to said cable inthe direction of the travel of the cable only.

5. In a conveying apparatus, the combination of a traveling cable and aload carriage, said carriage being supon a wheel and free to move in onedirection along said cable and restrained from movement in the oppositedirection.

6. In a conveying apparatus, the combination of a traveling cable and aload carriage, said carriage being sup ported on a wheel and free tomove in one direction and restrained from movement in the oppositedirection, the face of the wheel being provided with a groove fashionedso as to grip the cable.

7. In a conveying apparatus, the combination of a trav and therebyrelease the lastmentioned hook.

19. In a conveying apparatus, the combination of a towing vessel, atowed vessel, a towing-line, a cable-line extending to a tension devicebeyond the elevated support on the towed vessel, and a block attached tosaid elevated eling Cable, a load Carriage adapted t0 travel in the Samesupport' and through which the cable line passes, such direction as themovement of the cable at a higher rate block being constructed andarranged to afford a Slight 0f Deed. sistance to strains appliedhorizontally in the direction of S. In a conveying apparatus, thecombination of a traveling cable, a load carriage adapted to movelongitudinally with respect to said cable in the direction of the motionof the cable, said carriage being provided with a grip whereby the saidcarriage may be propelled by said cable.

9. In a conveying device employing a suspended cable, the combinationwith said cable, of a load carriage free to travel by gravitylongitudinally along said cable, means for preventing the backwardmovement of the carriage and means whereby said carriage is propelled onthe up grade of said cable.

10. In a conveying apparatus, in combination, a suspended endlesstraveling cable, means for propelling said cable, a load carriage freeto travel on the down grade of said cable and a grip whereby said loadcarriage is prothe cable-line, and a relatively considerable resistanceto strains applied in other directions.

20. In a conveying apparatus, the combination of a towing vessel, atowed vessel, a towing line, an endless cable, a tail-block, a carriagesupporting said block, a tension device attached to said carriage, theconnection between said tail block and carriage being arranged to afforda slight resistance to strains applied horizontally in the direction ofthe cable-line and a relatively considerable resistance to strainsapplied in other directions.

21. In a conveying apparatus, the combination of a towing vessel, atowed vessel, a towing line, an endless traveling cable connecting saidvessels, a haul-down-block having a running engagement with the lowerline of said endless cable and means for vertically adjusting theposition of said haul-down block to control the grade of said line.

22. In a conveying apparatus, the combination of a towing ship, a towedship, a tow-line, a cable-line extending from the towing ship to andbeyond an elevated support on said towed ship, a tension device attachedto said cable-line, a load carriage on said cable-line, an elevatingdevice consisting of a cable extending from the deck of one of saidships to an elevated support, an auxiliary load carriage traveling iaryload carriage and a drophook whereby said auxiliary load carriage maydrop its load to the principal load carriage.

23. In a conveying ble, a load carriage 11. In a conveying apparatus,the combination of a towing vessel, a towed vessel, a towing-line,'acableline, a tension device attached to the cableline and means wherebywhen the distance between the vessels becomes abnormal and thecable-line is carried forward a prescribed dis tance, the tension of thetension-device is released.

12. In a conveying apparatus, the combination of a tow ing vessel, atowed vessel, a towing line, an endless cable line, a tension deviceattached to the endless cable line and distance between the vesselsbeendless cable-line is carried forward a prescribed distance, thetension of the tensiondevice is released. I

13. In a conveying apparatus, the combination of a tow ing vessel, atowed vessel, a towing-line, an endless and traveling cable line, atension device attached to the endless and traveling cable1ine and meanswhereby when the apparatus, the combination of a cafree to movelongitudinally with re in one direction only, a stationary track at thereceiving end of said cable adapted to receive the load and from whichit is transferred to the cable.

2-}. In a conveying apparatus, the combination of a traveling cable, aload carriage free to move longitudinally with respect to said cable inone direction only, a stationary track at the receiving end of saidtraveling cable load and from which it is transferred to the travelingcable.

25. In a conveying device, a towing ship, a towed ship, a tow line, anelevated cable over said ships, a load carriage free to travel bygravity :1 portion of the distance and supplementary mechanism forcompleting the journey of the load carriage. 1

released.

14. In a conveying apparatus, the combination of a towing vessel, atowed vessel, a towing-line, a cable-line, a tension device attached tothe cable-line and means whereby, when the distance between the vesselsbecomes abnormal and the loop of the cable-line is carried forward ofthe bow of the towed vessel a prescribed distance, the tension of thetension-device is released.

15. In a conveying apparatus, the combination of a towscans 26. Thecombination of a traveling cable, a load carriage adapted to travelalong said cable at a higher rate of speed than the movement of suchcable and means for automatically releasing a load from the carriage.

27. The combination of a towing boat, a towed boat, a cable extendingbetween said boats, a carriage comprising a wheeled member and a hookconnected thereto on said cable, an elevating truck for the load, meansfor imparting motion to the cable, means for releasing the load from thecarriage, and means for hauling down said cable.

28. The combination of a traveling cable, a carriage free to travel bygravity along said cable, means whereby said carriage is propelled upgrade on the cable, means for hauling down said cable, and means forreleasing a load from the carriage.

2E). The combination of a cable, a carriage free to travel by gravityalong said cable, a portion of the distance of such cable and adapted tobe positively propelled by the cable the remainder of the distance ofits travel, means for preventing the backward travel of the carriage,means for hauling down said cable, and means for releasing the load fromthe carriage.

30. The combination of a suspended cable, supports for the same, meansfor propelling said cable, a carriage adapted to travel along said cableat a higher speed than the travel of the cable, and a haul-down devicefor said cable.

In witness whereof, I have hereunto signed by name in the presence oftwo subscribing witnesses.

THOMAS SPENCER MILLER.

Witnesses R emann W. SEABURY, JOHN SINCLAIR.

